... 4 khzTube Material: high quality 96 CeramicOutput: 3.1kv-3.5kvUnder the Oxygen circumstance:The flow rate is at 0.5L ... Function:It is suitable for pure and fresh machine, air purifier, water treatment machine, sterilizing cabinet, oxygen bar, purifier, clothes ... dryer, dry shoes machine, refrigerator, drinking fountain, oxygen bar, household electrical appliances ...